7. Chylomicrons are absorbed from the intestines into the: a. Hepatic Portal Vei

Question

7. Chylomicrons are absorbed from the intestines into the: a. Hepatic Portal Vein b. Hepatic Artery c. Lymphatic system d. Myenteric plexus 8. Which of the following is TRUE? a. The hepatic portal vein transports water-soluble vitamins, amino acids and monosaccharides from the small intestine to the liver b. The lymphatic system transports water-soluble vitamins, amino acids and monosaccharides from the small intestine to the liver c. The hepatic portal vein transports lipids from the small intestines to the liver 9. Which of the following is TRUE about the stomach? a. It contains 3 layers of smooth muscle that contract to mechanically break up food and propel food forward by peristalsis. b. it contains gastric glands that secrete Gastrin hormone into the stomach c. Only gastric distention due to stimulation of stretch receptors causes gastric motility. 10. How does a proton pump inhibitor work? a. It bonds to and blocks H2 receptors on parietal cells b. It blocks the active transport of Hydrogen protons from parietal cells into the stomach c. It blocks secretions of chief cells How does a H2 blocker prevent gastric secretion of HCI? a. It blocks the primary active transport of Hydrogen from parietal cells b. It prevents Histamine from binding to H2 receptors on parietal cells c. It blocks Histamine secretion from enterochromaffin like cells 11. 12. Which of the following is NOT a function of pancreatic bicarbonate? a. It buffers gastric acid entering into the intestines b. It provides an alkaline pH for the intestinal and pancreatic enzymes c. It stimulates the secretion of pancreatic enzymes 13. Fat digestion would occur fastest in which of the following test tube. (the tubes indicate the ORIGINAL contents) a. Test tube 1: Originally contained vegetable oil, lipase and HCO3 (bicarbonate) b. Test tube 2: Originally contained vegetable oil, lipase, bile and HCO3 (bicarbonate) c. Test tube 3: Originally contained vegetable oil, lipase, bile and HCI

Explanation / Answer

Answer 7. Chylomicrons are absorbed from the intestine into the lymphatic system. Instead of directly absorbed by blood vessels the chylomicrons are absorbed by lymphatic vessels that are present in the villus. The lymph containing chylomicrons then flows into the blood.

Answer 8. True statement is option a that is hepatic Portal vein transport water soluble vitamins, amino acids and monosaccharides from small intestine to the liver. The portal vein thus make dual blood supply to the liver that is hepatic vein and portal vein both supply blood to the liver.

Answer 9. True statement about stomach is option a that is it contains three layers of smooth musclethat contract to mechanically break up food and propel the food by peristalsis. The stomach contains one extra layer of smooth muscle known oblique muscle along with longitudinal and transverse layer. This provides stomach the extra strength to the stomach.

Answer 10. Answer will be option b that is it blocks the active transport of hydrogen protons from parietal cells into the stomach. Proton pump inhibitors work to block proton pump which actively transfer hydrogen from parietal cells into the stomach.

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